Safe fire map has important guiding role in weather modification. Aiming at village area image extracted from remote sensing image

a new method for automatic drawing of safe fire map is proposed. Morphological dilation

sector meshing and preliminary deletion are utilized in binary images which are initially identified safe areas first. Searching and merging safe areas are using a graphic search algorithm

while regular fan zones which help guide the weather modification work is achieved

automatic drawing of safe areas map in binary images is realized. Experimental results show that this algorithm can be used to drawing the safe fire map

the radial length is long

the area is large

the speed and accuracy is high

it can be applied to guide the weather modification works.